That's a good thing for us, isn't it? The Master not knowing who he is? Given what you and the Doctor have said about him....

[Which reminds her.]

I don't suppose you know anything about the other Time Lord - Time Lady - who arrived recently? Romana, I think she said her name was?

[She'd said it to someone, and it wasn't filtered. And Sarah Jane's been keeping a watch for anyone else from their particular dimension.]